So what you are saying you want a shitty AV that would not recognize a potentially malicious executable? Any normal AV should flag crack as a potential threat due to what it does.
Stick with Defender and whitelist executables you trust. This is computing 101.
While decentralised systems can be useful it will not be the future. Initially everything was decentralised and then we moved to centralised systems because they are easier to manage, easier to secure, cheaper. The main benefit for decentralisation is that you are not tied to single organization that dictates all the rules. If reddit would have better management, I would move back.